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Finding the Fourth Proportional to 27.66, 38.21 and 25.19

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Solution

The fourth proportional to 27.66, 38.21 and 25.19 is: 34.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.66 : 38.21 = 25.19 : x
  2. Step 2: Convert to fraction form
    27.66/38.21 = 25.19/x
  3. Step 3: Cross multiply
    27.66x = 38.21 × 25.19
  4. Step 4: Simplify right side
    27.66x = 962.51
  5. Step 5: Solve for x
    x = 962.51/27.66
  6. Step 6: Final answer
    x = 34.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.